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Collisions with building windows are thought to be a significant source of mortality for urban birds. Past studies on bird-window collisions have used a variety of survey methods to estimate the magnitude of mortality, and few have constructed methods in light of the biases related to scavengers and worker abilities that lead to imperfect detection of carcasses. Adoption of a systematic carcass survey protocol in future studies would reduce site-specific biases and among-site surveydoi:10.7287/peerj.preprints.406v1 fatcat:5udk6tl2i5bzpdogwllwa2udgi